Compensated orifice for use in hydrostatic fluid bearing

Details Compensated orifice for use in hydrostatic fluid bearing Compensated orifice for use in hydrostatic fluid bearing

2008-07-08

2008-07-08

Hannon, Thomas R. (Department: 3682)

Bearings

Rotary bearing

Fluid bearing

C384S107000, C384S110000

Reexamination Certificate

active

10938027

ABSTRACT:
A hydrostatic bearing design employing inherently compensated orifices whose geometric design is such that the use of multiple orifices is substantially simplified. In normal cylindrical hydrostatic bearings, the orifices are usually employed in rows. There can be from three to 120 orifices per row, and usually from one to six rows in most designs. In these designs, the orifice is usually a separate component, which is pressed into the surface that constitutes the bearing. Inherently compensated orifices are comprised of three sections, i.e. the entrance section, the restricting orifice section, and the exit section. The first two of these sections are of circular cross section. This design employs slots versus cylindrical type of construction, thereby giving square or rectangular cross sections. The manufacturing of this type of hydrostatic bearing is greatly simplified since only three or slightly more parts are required, versus a separate part for each orifice. Various details are described with respect to the various structures illustrated. This design can be used not only with the typical cylindrical type bearing, but also can be utilized in flat and conical bearing geometries.

REFERENCES:
patent: 3186774 (1965-06-01), Wilcox
patent: 3606501 (1971-09-01), Waplington
patent: 4828403 (1989-05-01), Schwartzman
patent: 4919547 (1990-04-01), Schwartzman
patent: 2004/0247211 (2004-12-01), Hamke
patent: 55126118 (1980-09-01), None

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